We introduce a new composite Fourier-plane binary phase-only correlation filter (BPOF). The filter is defined with the use of a nonquadratic energy function and is optimized numerically with a variant of the genetic algorithm. A possible application of the filter could include automatic postcode recognition. The paper also contains an introduction to composite filtering and a short overview of the present state of technology in the field of coherent optical correlators.
This paper presents a numerical and experimental optimisation of the two-seated A S-2 aircraft. In the numerical part of study, geometrical modifications and the flow field analysis of some selected regions of the aircraft i.e. cockpit-wings, cockpit - rear part of the fuselage were performed. The wind tunnel experiments of initial and modified versions of the aircraft model were made, too. The balance measurements and tufts flow visualisation was conducted as well.
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